Hydrolase-Catalysed Preparation of Chiral α,α-Disubstituted Cyanohydrin Acetates
作者:Jarle Holt、Isabel W. C. E. Arends、Adriaan J. Minnaard、Ulf Hanefeld
DOI:10.1002/adsc.200700053
日期:2007.6.4
The enzymatichydrolysis of esters of tertiary alcohols has long been a challenge. In particular their kinetic resolutions have virtually not been addressed. Here we describe the successful kinetic resolution of α,α-disubstituted cyanohydrin acetates, a type of protected tertiary alcohols that form particularly interesting building blocks in organic synthesis. Utilising Subtilisin A the hydrolysis reaction
Mycelia containing carboxyl-esterases, a novel source of enzymes, have been investigated in the hydrolytic kinetic resolution of one type of tert-alcohols, alpha,alpha-disubstituted cyanohydrins. This class of enzymes Was found to be both active and selective towards these tert-alcohols, giving E-values as high as 42. (C) 2009 Elsevier B.V. All rights reserved.